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SARS-CoV-2 B.1.1.529 (Omicron) Variant — United States, December 1–8, 2021 | MMWR

https://cdc.gov/mmwr/volumes/70/wr/mm7050e1.htm

“This report describes the initial spread and impact of the Omicron COVID-19 variant in the U.S.” (the page’s own description)

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